Bump version to 1.1.1 and update related manifests

- Updated version in package.json and package-lock.json to 1.1.1
- Changed version in deployment manifest files to 1.1.1
- Added new elements.xml for MegaMenu Application Customizer

package.json

@@ -1,6 +1,6 @@
 {
   "name": "mega-menu",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "private": true,
   "main": "lib/index.js",
   "engines": {